Research of parameter distributing simulation and modeling for the condenser in nuclear power plant

摘要

Condenser is an important component in the secondary loop of nuclear power plant. The modeling method is developed based on the physical model and reasonable assumptions. The parameter expression could calculate and simulate along with flow direction at any designated position through mathematical derivation. The influence of non-condensable gas in the condenser and liquid film heat conduction around the tube is applied to the simulation model which would impact heat transfer process. There are empirical correlations for these process and situation which could make the simulation model more detailed and accurate. There is simulation and calculation for the thermal hydraulic characteristics of the condenser both in steady state and during dynamic process. Main and key parameters are chosen to compared with the design data in the steady state. The results represent that the simulation model could have enough accuracy in the steady state. For the dynamic process there are two working conditions compared with JTopmeret and another extended working condition simulated for analysis. The dynamic responding could work well compared with JTopmeret in different working conditions which could prove the credibility of simulation model. With different requirements there may be different parameters obtaining in the calculation and simulation process. The simulation model could easily acquire parameters distribution along with flow direction. This method could use for the other similar condensers with the same physical process or structure. The present work can provide references for the design, operation and simulation of condensers in nuclear power plant. (C) 2019 Elsevier Ltd. All rights reserved.